Enhance Your Penis in the Shower

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Hey guys, is the Helicopter Shake done hands-free (meaning just 1 hand holding the base the penis swinging freely) are both hands involved? (the other hand holding the tip?). If its a 2-handed process, then is it a "faster" rotating stretch? I feel like I'm missing something and since it's recommended so much, I'd like to get it right.
thanks, TMdude